Two positively charged particles are separated on an axis by 0.1 meters; q1 has a 3 microcoulomb charge and q2 has a 2 microcoulomb charge. Recall that k = 8.99 × 10^9 N • meters squared over Coulombs squared.

a) What is the magnitude of the force applied between q1 and q2?
b) Is the force on q2 directed toward or away from q1?

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Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)